.app {
  color: #cccccc;
  flex-wrap: wrap;
  font-family: MicrosoftYaHei;
  font-weight: 400;
  height: 100%;
}

/* 左侧nav */
.target_l {
  width: 248px;
  font-size: 15px;
  line-height: 36px;
  background: rgba(31, 32, 37, 1);
}

.target_l span {
  display: block;
  padding-left: 20px;
}

.target_nav_txt {
  width: 227px;
  height: 36px;
  margin-top: 1px;
  cursor: pointer;
  background: rgba(39, 40, 46, 1);
  -webkit-user-select: none;
  /*webkit浏览器*/
  user-select: none;
}

.target_nav_txt .icon {
  width: 10px;
  height: 10px;
  display: inline-block;
  margin-left: 11px;
  background: url($PIC_URL + '/tlbypcWeb/targetIntroduce/xiala1-copy.png') no-repeat center;
}

.target_nav_ai .icon {
  margin-left: 26px;
}

.target_nav_list {
  display: none;
  padding: 7px 0;
  transition: 0.5s all;
}

.target_nav_item {
  width: 227px;
  height: 28px;
  line-height: 28px;
  cursor: pointer;
  transition: 0.3s all;
}

.target_nav_item::before {
  content: "";
  width: 5px;
  height: 5px;
  display: inline-block;
  background: rgba(102, 102, 102, 1);
  border-radius: 50%;
  margin-right: 10px;
  position: relative;
  top: -3px;
}

/* nav选中 */
.on .target_nav_list {
  display: block;
  transition: 0.5s all;
}

.on .target_nav_txt .icon {
  background: url($PIC_URL + '/tlbypcWeb/targetIntroduce/xiala.png') no-repeat center;
}

.on .target_nav_item.select {
  color: rgba(89, 136, 255, 1);
  background: rgba(36, 37, 41, 1);
  transition: 0.3s all;
}

.on .select::before {
  background: rgba(89, 136, 255, 1);
}

.scroll {
  overflow-y: scroll;
}

.target_l .scroll {
  width: 260px;
}

.target_l ::-webkit-scrollbar-thumb {
  display: none;
}

/* 右侧展示 */
.target_r {
  flex: 1;
  background: rgba(39, 40, 46, 1);
}

.main {
  padding: 0 20px 50px;
  font-size: 16px;
  line-height: 28px;
  overflow-y: scroll;
  color: rgba(219, 219, 219, 1);
  font-family: MicrosoftYaHei;
}

.main .h1_title {
  font-size: 22px;
  color: rgba(255, 255, 255, 1);
  line-height: 42px;
  text-align: center;
  margin: 20px 0;
}

.main .vue_way {
  margin-top: 40px;
}

.main .img {
  max-width: 920px;
  margin: 23px auto;
}
.main img {
  width: 100%;
}
.vue_txt_em {
  text-indent: 2em;
}
.main_pt .img {
  max-width: 1052px;
}

.main_pt img {
  width: 100%;
}
